Which plant element accounts for at least one half of the total number of ions absorbed
A. N
B. K
C. Ca
D. Zn
Answer: Option A
A. N
B. K
C. Ca
D. Zn
Answer: Option A
Sources of negative charges on silicate clays is/are
A. Exposed crystal edges
B. Isomorphus substitution
C. Anion exchange
D. All of these
The most conspicuous chemical change that take place when soil is flooded is reduction of
A. Fe
B. P
C. S
D. None of these
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